METHOD, DEVICE AND COMPUTER PROGRAM FOR MAPPING CHIP OF SPREAD-OUT SYMBOL TO SUB-CHANNEL, AND METHOD, DEVICE AND COMPUTER PROGRAM FOR DE-MAPPING CHIP OF SPREAD-OUT SYMBOL FROM SUB-CHANNEL

摘要

PROBLEM TO BE SOLVED: To provide a method of mapping chips of a spread-out symbol to sub-channels of a group of sub-channels of a Multi-Carrier transmission channel of a Multi-Carrier transmission network. SOLUTION: The spread-out symbol is formed by multiplying a data item to be transmitted by elements of a spreading sequence, the mapped chips are further modulated using an orthogonal frequency division multiplexing modulation, and each sub-channel of the Multi-Carrier transmission channel is defined by a carrier frequency of the Multi-Carrier transmission channel and a time slot wherein an orthogonal frequency division multiplexing symbol is transmitted. The chips are ordered in a predetermined order, the first chip is mapped to a sub-channel and each following chips are mapped to a sub-channel which has the same carrier frequency or the same time slot as the sub-channel of which the previous chip has been mapped to. The method concerns also a de-mapping method and associated devices. COPYRIGHT: (C)2005,JPO&NCIPI